一种改进的频移键控调制信号盲识别方法研究  

Modified Blind Recognition Method for FSK Modulated Signal

作　　者：席建民 邱涛 吉磊[1] XI Jian-min;QIU Tao;JI Lei(No.30 Institute of CETC,Chengdu Sichuan 610041,China)

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2020年第4期824-829,共6页Communications Technology

摘　　要：频移键控信号在民用和军事通信领域得到了广泛应用,因此对频移键控调制信号识别分析也具有重要意义。针对过去一些方法存在的问题,提出了一种改进的频移键控调制信号盲识别方法。新方法采用基于循环平稳特性的核心思想,能更好地适用于低信噪比下的复杂电磁环境。它可在无先验信息的情况下实现对频移键控信号特征的提取,是一种高效的识别方法,具有良好的稳健性和工程实用性。计算机仿真表明,新改进算法在较低信噪比条件下能达到较高的正确识别率,相比过去的方法性能更优。FSK signal is widely used in the field of civil and military communication,so it is also of great significance for FSK modulation signal identification and analysis.Aiming at the problems of some methods in the past,a modified blind recognition method for FSK modulation signal is proposed.The new method,based on the core idea of cyclostationarity,can be fairly applicable to the complex electromagnetic environment with low SNR and realize the feature extraction of FSK signal without prior information.It is an efficient recognition method with good robustness and engineering practicability.Computer simulation indicates that this new modified algorithm can achieve fairly high correct recognition rate under the condition of lower SNR,and has better performance than the previous methods.

关 键 词：频移键控信号 盲识别 循环频率 循环平稳统计量 

分 类 号：TN918.91[电子电信—通信与信息系统]